Gas cooking-stove.



Inventor PATENTED APR. 11, 1905.

M. EHRSAM.

GAS COOKING STOVE.

APPLIOATION FILED MAY 26, 1904.

Witnesses.

Patented April 11, 1905.

UNTTE STATES PATENT @rmce.

MEINRAD EHRSAM, OF ZURICH, SVITZERLAND.

GAS COOKING-STOVE.

SPECIFICATION forming part of Letters Patent No. 787,159, dated April 11, 1905.

Application filed May 26,1904. Serial No. 209,956.

To (17/ Ir/mm if our. concern.-

Be it known that I, Mntxnao Ennsnl', a citizen ot' the Swiss Republic, residing at Zurich, Switzerland, have invented a certain new and useful Improvement in (las (looking-Stoves, of which the following is a specification.

This invention relates to improvements in gas cooking-stoves. According to my invention the burners are placed in closed combustion-chambers having an inlet for the air necessary to promote combustion and an outlet for the products of comlnistion, which latter are conducted through a closed pipe into a tlue having direct communication with the open air or leading thereto by way of a chimney in such a manner that during their passage their contained heat is utilized for heating a warmer connected with the gas-stove. In most existing torms of gas cooking-stoves the products of combustion after use in the stove are allowed to escape into the kitchen or other room, which for sanitary reasons is objectionable. .\loreover, in gas-stoves as at present constructed the heat in the products of combustion cannot be so completely utilized as is possible with apparatus constructed according to my invention.

In the accompanying drawings, Figure l is a vertical section through a gas cooking-stove constructed in accordance with this invention and talten on line A. B of Fig. Fig. 2 is a vertical section on line C l.) of Fig. 3, and Fig. 3 is a sectional plan taken on line E F of Fig. 2.

In Fig. 5 the section is displaced in the parts occu pied by the combustion-chambers in order to show the aperture through which the gaspipes are led to the burners and which also serves to admit the air necessary for combustion.

The stove is inclosed in a metal casing 11, which may be lined with non-conducting material.

The casing u contains a crucibleshaped chamber for each burner.

in the front wall of each chamber The burners f is an aperture traversed by the gas-pipes leading to the burners f and also serving to admit the air necessary for combustion, while near the top of the opposite wall of each chamber is the mouth of the pipe through which the products of combustion are removed.

Behind the chamber is a warming-oven r/, the bottom of which reaches nearly to the bottom of the stove, while the top projects above the stove-plate far enough to permitot the insertion of the articles that are to be kept warm and for the removal and replacement of the oven cover, which latter may consist, for instance, of sliding doors.

The warming-oven u is inclosed by the easing a on all sides except the one in which the oven is situated.

The products of combustion after having imparted some of their heat to the cookingpans escape from each chamber through a pipe w. These pipes convey the gases lirst through the bottom 01 the warming-oven (I, then through the space between the casing a, the chamber 6, and the oven 1!, the gas being then discharged into the open air. The pipes w may alter issuing from the stove be united to form a single line, as indicated in the drawings, whereby the products of combustion may be conveyed either into a chimney or direct into the outer air. Thespace between the casing u, chambers b, and oven 1! is partly lilled with water or other heat retaining agency, and suitable means for supplying it and drawing otl the water (not shown in the drawings) are provided.

A part of the heat of the waste gases traversing the pipe 0 is absorbed direct by the warming-oven (I, the remainder being utilized for heating the water in the intermediate space surrouinling the oven, so that the latter indirectly also receives a portion of that heat.

Any steam forming in the intermediate space can escape through a suitably-arranged valve into the common tlue for the products of combustion and be led away thereby.

A roaster could be arranged within the oven 1!, for example, with special overhead burners, the products ol combustion being then led away from such separate roasting-compartment through a pipe discharging into the common flue.

WVhat I claim is 1. In gas cooking-stoves the combination with an outer casing. having a Waste-space in the lower part thereof containing liquid, of combustion-chambers arranged therein and in said Waste-space having inlets for air and eX- its for waste gases, gas-burners in said cham bers, a warming-oven in juxtaposition thereto and having its lower part in said Wastespace, and pipes communicating with the exits in the chambers and passing through said space, around said oven, and thence to a flue, whereby the waste heat from the products of combustion is utilized to heat the liquid and the oven before such products are discharged to the open air.

2. In a cooking-stove the combination with an outer casing containing liquid, of a combustion-chamber surrounded by said liquid, heating means for said chamber, ingress means and egress-pipes for said chamber,and a warmingoven surrounded by said liquid, said egress-pipes passing through said liquid and warming-oven.

3. In a cooking-stove the combination with an outer casing containing liquid, of a combustion-chamber surrounded by said liquid, heating means for said chamber, ingress means and egress-pipes for said chamber, and a warmingoven within said casing, said egress pipes passing through said liquid and warmingoven.

4. In a cooking-stove the combination With an outer casing containing liquid, a combus tion-chamber surrounded by said liquid, heating means for said chamber, ingress means and egress-pipes for said chamber, and a warmingoven Within said casing, said pipes passing through said warming-oven.

5. In a cooking-stove the combination with an outer casing containing liquid, of a combustion-chamber Within said casing, heating means for said chamber, said chamber having ingress means and egress-pipes, said egresspipes passing through said liquid, and a warming-oven surrounded by said liquid.

6. In a cooking-stove the combination With an outer casing containing liquid, of a combustion-chamber within said casing, heating means for said chamber, said chamber having ingress means and egress-pipes, and a Warming oven surrounded by said liquid, said egress-pipes passing through said liquid and Warming-oven.

7. In a cooking-stove the combination with an outer casing containing liquid, of a combustion-chamber within said casing, heating means for said chamber, ingress means for said chamber egress-pipes for said chamber, and a warming-oven within said casing, said egresspipes passing through said liquid and warm.- ing-oven.

In testimony whereof I have'hereunto set my hand in the presence of two subscribing witnesses.

IWIEINRAD EHRSAM.

itness es:

LoUIs LEVAITTANT, JOSEPH SIMON. 

